Fans and players are starting to become very familiar with the uncomfortable sensation. Glare is occurring with greater frequency, especially in sports venues, as manufacturers are doing everything they can to push as much light as possible out of a fixture. They accomplish this by utilizing higher efficiency LEDs and forcing light from those LEDs through small, individual TIR lenses and reflectors. The lenses concentrate the light for better delivery, but inevitably create unacceptable levels of glare.
With sports lighting, lumen density per square inch can also be used to show relative glare factor. To accurately measure light density, LED Magazine recommended the following: A common mistake in measuring LED luminaire luminance is measuring the entire fixture. Luminance must be measured at the luminous opening, in other words at the smallest point (without any breaks) that emits light out of the fixture.
If one were to measure the entire LED luminaire, it would not account for the “shards” of light emitted from each individual LED. The light emitted from individual LED luminaire designs is more akin to a series of laser beams in contrast to the homogenous output of a traditional luminaire. As illustrated on the left, many conventional LED sports lights utilize numerous small, plastic TIR lenses which condense and collimate light emitted by LEDs. In practice, such LEDs can produce over 1000 lumens each and can average a lumen density of 1275+ Lumens /sq. in. (with substantially higher peak lumen densities). Such concentrated, ultra-bright points inherently produce very noticeable glare.
Sportsbeams took a different design approach. With over a decade of LED design experience in the movie industry, we knew that eliminating glare had to be a top priority.
Our design incorporates a broad, single glass lens to provide a much more uniform lumen density of 346 lumens/sq. in. This design distributes light evenly over 50,000x the area of each individual LED light source, maximizing both the emitting area of luminaries and uniformly redistributing the originating ultra-bright points of LEDs.
This greatly reduces the amount of glare. Getting bright light from a sports lighting fixture is relatively easy. Designing a fixture that utilizes that light without producing unacceptable levels of glare is physically impossible without incorporating our patented design. This design, in conjunction with other numerous features, makes Sportsbeams’ Sports Lighting Fixtures the absolute best choice for all high-power lighting needs.
TYPICAL SPORTS LIGHTING FIXTUREUltra Bright Multiple-Points of LEDs with 1275+ Lumens /sq. in
SPORTSBEAMS SINGLE OPTICUniform Single-Point LED Distribution with 346 Lumens /sq. in